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Finding the Fourth Proportional to 686,550.53, 947,469.69 and 380,607.46

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Solution

The fourth proportional to 686,550.53, 947,469.69 and 380,607.46 is: 525,254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,550.53 : 947,469.69 = 380,607.46 : x
  2. Step 2: Convert to fraction form
    686,550.53/947,469.69 = 380,607.46/x
  3. Step 3: Cross multiply
    686,550.53x = 947,469.69 × 380,607.46
  4. Step 4: Simplify right side
    686,550.53x = 360,614,029,769.21
  5. Step 5: Solve for x
    x = 360,614,029,769.21/686,550.53
  6. Step 6: Final answer
    x = 525,254.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.